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A086467 Decimal expansion of 2ArcCsch[2]^2. +0
4
4, 6, 3, 1, 2, 9, 6, 4, 1, 1, 5, 4, 3, 8, 8, 7, 8, 4, 9, 9, 3, 8, 5, 8, 1, 4, 2, 4, 6, 3, 0, 6, 5, 5, 2, 0, 0, 3, 2, 8, 1, 2, 7, 0, 0, 0, 9, 8, 5, 9, 7, 7, 4, 1, 6, 3, 0, 6, 0, 2, 4, 5, 7, 3, 7, 9, 5, 9, 0, 6, 9, 1, 1, 3, 3, 9, 2, 3, 6, 2, 5, 9, 7, 0, 1, 0, 9, 0, 9, 4, 1, 7, 2, 7, 7, 6, 7, 9, 0, 1, 1, 1 (list; cons; graph; listen)
OFFSET

0,1

COMMENT

Sum[(-1)^(n-1)/n^2/Binomial[2n,n],{n,Infinity}]

LINKS

Eric Weisstein's World of Mathematics, Central Binomial Coefficient

EXAMPLE

0.4631...

CROSSREFS

Cf. A086465, A086466, A086468.

Adjacent sequences: A086464 A086465 A086466 this_sequence A086468 A086469 A086470

Sequence in context: A066891 A087231 A019211 this_sequence A138508 A016492 A081709

KEYWORD

nonn,cons

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), Jul 21, 2003

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Last modified October 12 12:59 EDT 2008. Contains 144830 sequences.


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